During an investigation, a student used a stirring rod to stir a solid precipitate that was drying, prior to being weighed. Explain to the students how this might affect the actual yield of th reaction.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

The rules of engagement (roe) working group is often used to (select all that apply.)

0.09 moles of sodium sulfate in 12 ml of solution